Merely Coincidence?

Here's a thought-provoking read from Eurosport:
"Tyler Hamilton, Roberto Heras and now Floyd Landis -- the former lieutenants of seven-time Tour de France champion Lance Armstrong are falling like flies. Felix Lowe looks into this uncanny phenomenon and asks if it is merely coincidence or if there's something more untoward under the surface."

I'm surprised that there hasn't been more in the press on the subject to date.